Profesional help i need

Hello, I'm looking for someone that can design and develop a complete website from scratch to automatically handle CSGO skin buying. I want my customers to be able to sign-in via their Steam accounts, submit their tradelinks, view their inventories, select which skins they want to sell and instantly recieve an offer based on a % of steamanalyst prices (or steam market price, I should be able to choose in backend). If they accept the offer, they get to select where they want to recieve the money (paypal, skrill, neteller, credit card, bitcoin, bank etc. preferable if you can integrate the swedish swish-API as well), they then get a trade-offer in steam from our bots to handle the trade of the selected items and when the trade is complete and we recieve the correct items, the customer is payed via the selected payment method. I expect that this takes extensive knowledge in steam-api, steamanalyst-api and various payment system integrations as well as scripting CS:GO-bot accounts to integrate with the system. I also require solid security measures on the website since I expect plenty of hacking attempts and DDOS-attacks. I need my customer security to be top-notch at all times. Other than that, I'd love integrated systems for referrals, affiliates and so on, as well as a system in the back-end that lets me manually handle support tickets. This means, in order to handle support effectively, i need to be able to administrate everything manually as well in case issues arise for my clients. Also, in the back-end, a system to adjust prices based on either the steam market or steamanalyst would be awesome. (i.e. 60% of the steamanalyst price, or 55% of the steam market price. Something like that). Contact me for more information! I look forward to hear from you soon!